6518307842 has 6 divisors (see below), whose sum is σ = 9777633033. Its totient is φ = 3259096832.

The previous prime is 6518307833. The next prime is 6518307853. The reversal of 6518307842 is 2487038156.

It can be written as a sum of positive squares in 2 ways, for example, as 6478479121 + 39828721 = 80489^2 + 6311^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=57089.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6518307793 and 6518307802.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 85634 + ... + 142722.

Almost surely, 2^6518307842 is an apocalyptic number.

6518307842 is a deficient number, since it is larger than the sum of its proper divisors (3259325191).

6518307842 is an frugal number, since it uses more digits than its factorization.

6518307842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114180 (or 57091 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 6518307842 is about 80736.0380623176. The cubic root of 6518307842 is about 1868.0060955420.

The spelling of 6518307842 in words is "six billion, five hundred eighteen million, three hundred seven thousand, eight hundred forty-two".